Wow! I knew there was vibration/buffeting problem but I didn't think it was that severe. Makes me sick to my stomach thinking people drop hard earned money only to have issues like that.
Looks like autoblog has a report on all the issues now too. I'm glad it's getting more attention.
'Fullsize GM SUVs have a problem that's making owners sick'
http://www.autoblog.com/2015/12/30/fullsize-gm-suvs-making-owners-sick-report/
I owned a 2011 Yukon XL SLE for 2 years and loved it to death. Been wanting to get a new one since but this 105 page thread (read every post) has helped me make an informed decision.
yahtzee, I signed up just to say thanks for taking the initiative, time and effort in order to get that great article published.
I'm rooting for all you guys with the buffeting/vibration issues. Stay determined and it'll pay off!